Java RabbitMQ可以'；我没有收到消息

在本例中，我使用的是与本教程相同的类：

我有两门课： Send.java

import com.rabbitmq.client.Connection;
import com.rabbitmq.client.Channel;

import java.io.IOException;
import java.util.concurrent.TimeoutException;

public class Send {

    public static final String QUEUE_NAME="hello";



    public static void main(String[] args) {
        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost("localhost");
        Connection connection=null;
        Channel channel =null;
        try {
            connection = factory.newConnection();
            channel = connection.createChannel();
            channel.queueDeclare(QUEUE_NAME,false,false,false,null);
            String message = "Hello word toto";
            channel.basicPublish("",QUEUE_NAME,null,message.getBytes());
            System.out.println(" [ x ] Sent '"+message+"'");
        } catch (IOException e) {
            e.printStackTrace();
        } catch (TimeoutException e) {
            e.printStackTrace();
        }finally {
            try {
                channel.close();
            } catch (IOException e) {
                e.printStackTrace();
            } catch (TimeoutException e) {
                e.printStackTrace();
            }
            try {
                connection.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}

和receiv类：

import com.rabbitmq.client.*;

import java.io.IOException;
import java.util.concurrent.TimeoutException;

public class Receiv{
    private final static String QUEUE_NAME = "hello";

    public static void main(String[] args) {
        Connection connection=null;
        Channel channel=null;
        ConnectionFactory factory = new ConnectionFactory();
        factory.setHost("localhost");
        try {
            connection = factory.newConnection();
            channel = connection.createChannel();
            channel.queueDeclare(QUEUE_NAME, false, false, false, null);
            System.out.println(" [*] Waiting for messages. To exit press CTRL+C");
            Consumer consumer = new DefaultConsumer(channel){
                @Override
                public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body)
                        throws IOException {
                    String message = new String(body, "UTF-8");
                    System.out.println(" [x] Received '" + message + "'");
                }
            };
            channel.basicConsume(QUEUE_NAME, true, consumer);
        } catch (IOException e) {
            e.printStackTrace();
        } catch (TimeoutException e) {
            e.printStackTrace();
        }finally {
            try {
                channel.close();
            } catch (IOException e) {
                e.printStackTrace();
            } catch (TimeoutException e) {
                e.printStackTrace();
            }
            try {
                connection.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
} 

我得到了类似于示例的编译结果，但我没有看到收到的消息

---

谢谢。

您是否向队列发送了消息？我直接使用了频道，但为什么？您会在第一次发送消息时收到消息，因此如果您没有向队列发送任何消息（队列为空），则您将不会收到任何消息谢谢，但在教程（）中，我认为他没有使用队列。简单地说，我的意思是，您需要先启动send类，然后再启动另一个类